Reply With QuoteMore likely a sticky heater valve. Have someone adjust the controls from hot to cold over and over and rap on the heater core with something (hammer pliers etc...) Mine would stick on until i did that, now no problems.
Individual temperature control intermittant
Hello all! I have a 1989 535i with a good aux fan, ice cold r134 conversion and I believe a good heater core. However, yesterday, the left set of vents only started blowing hot air whilst the others blew nice cold air- I fiddled with the left temp control up and down for a while, but no luck. Anyway, after a few hours, she blew cold again. Is the dial itself bad, or is there a sticking valve in the heater core? Thanks!
Chris
Big Time Poster
More likely a sticky heater valve. Have someone adjust the controls from hot to cold over and over and rap on the heater core with something (hammer pliers etc...) Mine would stick on until i did that, now no problems.
Big, Big Time Poster
I have have a very simmaler problem, witch bit should i be hitting exactly? sounds like an easy fix as ive already pulled the controls all apart to no avail!Originally Posted by colo525i
Major Contributor
That's the symptom of a heater valve being stuck in the default open position. I just replaced mine, cause I hate heat, but you can bang on it if you want. Sounds exciting.
Big, Big Time Poster
i don't mind banging on it for a bit, cant do anymore harm, coz its allready broken!! but not sure exactly which bit needs a good old banging exactly!!
3 Grand Master
right hand rear of engine compartement,ther are two valves probably hiding behind(under) a flat lastic panel...i think there is a link to some pics on e34 .net,
http://www.bmwe34.net/e34main/Mainte...eaterValve.htm
Last edited by Paul in NZ; 09-30-2007 at 03:13 AM.
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